Chimney-cap



(No Model.)

P. D.l SEXTON.

GHIMNEY GAP.

No. 319,750. PatemdJune 9, '1885.

W'b-LEEEEE;

UNITED STATES PATRICK D. SEXTON, OF WORCESTER, MASSACHUSETTS.

CHlMNEY-CAP.

SPECIFICATION forming part of Letters Patent No. 319,750, dated June 9, 1885. y

Application tiled February 28, i885. (No model l To all whom it may concern:

Be it known that I, PATRICK D. SnxToN, of Worcester, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Chimney- Caps; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accom` panying drawings, forming a part of this specification, and in which- Figure 1 represents a top or plan view of my aforesaid improved chimney-cap. Fig. 2 represents a side view of said cap looking in the direction of arrow a, Fig. l. Fig. 3 represents a top or plan view of my cap with the top part removed to show the parts under the same more fully; and Fig. 4 represents a vertical section through the cap, taken on line x w, Fig. 1, looking in the direction of arrow a, same figure.

To enable those skilled -in the art to which my invention belongs to make and use the same, I will proceed to describe it more in detail.

In the drawings, A represents the top of an ordinary chimney upon which is placed my improved cap B. Said cap B is in practice made of cast-iron, in the following manner: The lower or base part, b, is made with a downwardly-projecting flange, c,which fits over the top of the chimney to protect and hold the upper bricks in proper position from falling outward or into the chimney-flue. It is also provided with a projecting molding, d, for protecting the brick-work of the chimney from the injurious effects produced by water running down the sides of said chimney in a storm, or by the melting of snow and ice lodged upon its top. The sides of the base part b are inclined inward as they are extended up, first upon a slight angle, e, for about half of the distance up, and then upon amore acute angle, f, terminating in a slight outward cnrve,f, at the top, and an opening, g, with an area equal to or a little smaller than that of the flue 71J of the chimney. I prefer in practice to make said opening a little smaller than the chimney-flue, as I find that the draft is thereby exhilarated in connection with the other parts of my improved cap, hereinafter described.

I do not wish to limit myself to the exact shape or design of the part b hereinbefore described, as variations from the above are desirable under varying circumstances. Neither do I desire to limit myself in regard to the top part, k, hereinafter described, for the saine reason.

In placing the baseb upon the chimneyftop it is desirable to bed it in cement for obvious reasons, and to further assist in holding it in its proper position spurs Z are formed on its under side which penetrate and hold in the bedding of cement aforesaid.

Upon each of the corners m of the inclined parts f of the base b, next to the opening g, are formed upwardly-proj ecting flanges a, for supporting the top part, k, in its proper position over said base part. Said top part is provided upon its under side with suitable holding notches or slots, o, for the outer ends of the anges a to fit and hold against when the parts are placed together, as shown in the drawings. Said parts are fastened in the above-named positions by means of bolts p, which pass up through the inclined parts f of the base b and the inclined parts q of the top part, said bolts being provided with the heads p and nuts p2 for the above purpose. The top part, k, is provided with an upwardly-projecting part, r, and opening s, about equal in size to the top opening, g, of the base part,

and is extended out laterally over said basev part to form a hood over the latter, as shown in Figs. 2 and 4 of the drawings. An airpassage, t, is thus formed upon each side of the cap, which admits of the air entering said cap laterally and passing up through the top opening, s, as shown by the arrows in the above-named figures, thereby producing, as will be obviously seen, a strong upward suction, which produces a strong upward draft in the chimney, the curves f assisting to produce the above result.

It will be seen from the foregoing description that a chimney-cap thus constructed einbodies two very important and advantageous features-viz., a thorough protector for the chimney-top and a strong draft-producerwhile at the same time it presents a neat and tasty appearance upon a chimney-top.

So .far as my'present experience relates in IOO the application of my improved cap to practice, I have ascertained that the best results are produced by the construction hereinbefore described but it may be found advisable later to form one or more openings in the sides of the base part, b, as indicated by dotted lines u, to increase the draft in the chimney.

I therefore'wish to cover the use of such side openings in my present application.

I am aware of the patents granted to S. Merrick, July 4, 1876, No. 179,421; J. H. Irwin, October 10, 1882, No. 265,814, and Musbach and Smith, July 6, 1869, No. 92,341, and make no claim, broadly, to any of the features therein shown, described, and claimed, my claim being limited to the construction and arrangement of my improved cap, as set forth in my application, to produce the results th rein described,

Having described my improvements in chimney-caps, what I claim therein as new and of my invention, and desire to secure by Letters Patent, is-

An improved cast-iron chimney-'cap cousisting of two separate parts-a bottom or base and a top part or hood-the bottom part being l l f made with a downwardly-projecting flange upon its outer edge adapted to t over and hold the chimney-top from spreading when placed overthe same, with upwardly and inwardly inclined and curved sides terminating in a central opening at the top, of the same size or smaller than the chimney-fine, and with upwardly-projecting anges at the corners for forming a bearing for the top part aforesaid; and said top part made in the form of' a hood, having upwardly and inwardly inclined andvertical sides terminating in a central opening at the top, Yand holding notches or sockets vupon its under side for receiving the upper ends of the snpportings-flanges of the bottom part, to hold said top part in position laterally after having been placed and fastened thereon, said top and bottom parts being fastened together by means of suitable bolts and nuts, substantially as shown and described.

ALBERT A. BAKKER, WALTER B. NoURsE. 

